CA2363789A1 - Methode et appareillage pour eliminer les effets de puits de forage dus a un dipole magnetique incline ou transversal - Google Patents

Methode et appareillage pour eliminer les effets de puits de forage dus a un dipole magnetique incline ou transversal Download PDF

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Publication number
CA2363789A1
CA2363789A1 CA002363789A CA2363789A CA2363789A1 CA 2363789 A1 CA2363789 A1 CA 2363789A1 CA 002363789 A CA002363789 A CA 002363789A CA 2363789 A CA2363789 A CA 2363789A CA 2363789 A1 CA2363789 A1 CA 2363789A1
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Canada
Prior art keywords
current
borehole
disposed
tilted
instrument
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CA002363789A
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English (en)
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CA2363789C (fr
Inventor
Stephen D. Bonner
Richard A. Rosthal
Brian Clark
Thomas D. Barber
Dean M. Homan
Dzevat Omeragic
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Schlumberger Canada Ltd
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Schlumberger Canada Ltd
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Publication of CA2363789C publication Critical patent/CA2363789C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
    • G01V3/26—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
    • G01V3/28—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device using induction coils

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
CA002363789A 2000-12-15 2001-11-27 Methode et appareillage pour eliminer les effets de puits de forage dus a un dipole magnetique incline ou transversal Expired - Fee Related CA2363789C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/737,891 2000-12-15
US09/737,891 US6573722B2 (en) 2000-12-15 2000-12-15 Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipole

Publications (2)

Publication Number Publication Date
CA2363789A1 true CA2363789A1 (fr) 2002-06-15
CA2363789C CA2363789C (fr) 2004-05-04

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CA002363789A Expired - Fee Related CA2363789C (fr) 2000-12-15 2001-11-27 Methode et appareillage pour eliminer les effets de puits de forage dus a un dipole magnetique incline ou transversal

Country Status (6)

Country Link
US (4) US6573722B2 (fr)
AU (1) AU765066B2 (fr)
CA (1) CA2363789C (fr)
GB (1) GB2376076B (fr)
NO (1) NO20016101L (fr)
RU (1) RU2305300C2 (fr)

Families Citing this family (93)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1142270A (en) * 1969-03-18 1971-08-19 Shikoku Kasei Kogyo Company, Limited Paper andthe like permeated by liquid oil
JP4249268B2 (ja) * 1997-04-14 2009-04-02 トムソン コンシューマ エレクトロニクス インコーポレイテッド ビデオ・デコーダ・システムにおいて利用可能なプログラム・コンテンツのプログラム・ガイドを形成する方法
US7659722B2 (en) * 1999-01-28 2010-02-09 Halliburton Energy Services, Inc. Method for azimuthal resistivity measurement and bed boundary detection
US6163155A (en) * 1999-01-28 2000-12-19 Dresser Industries, Inc. Electromagnetic wave resistivity tool having a tilted antenna for determining the horizontal and vertical resistivities and relative dip angle in anisotropic earth formations
US6693430B2 (en) * 2000-12-15 2004-02-17 Schlumberger Technology Corporation Passive, active and semi-active cancellation of borehole effects for well logging
AU2003213544B2 (en) * 2000-12-15 2005-03-17 Schlumberger Technology B.V. Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipole
US6556015B1 (en) * 2001-10-11 2003-04-29 Schlumberger Technology Corporation Method and system for determining formation anisotropic resistivity with reduced borehole effects from tilted or transverse magnetic dipoles
FR2836557B1 (fr) * 2002-02-28 2004-05-28 Schlumberger Services Petrol Procede et dispositif de prospection geophysique d'une formation geologique poreuse contenant au moins un fluide electrolyque
US6667620B2 (en) * 2002-03-29 2003-12-23 Schlumberger Technology Corporation Current-directing shield apparatus for use with transverse magnetic dipole antennas
US7340508B1 (en) * 2002-09-18 2008-03-04 Open Invention Network, Llc Exposing process flows and choreography controllers as web services
US7436183B2 (en) * 2002-09-30 2008-10-14 Schlumberger Technology Corporation Replaceable antennas for wellbore apparatus
US6819111B2 (en) 2002-11-22 2004-11-16 Baker Hughes Incorporated Method of determining vertical and horizontal resistivity, and relative dip in anisotropic earth formations having an arbitrary electro-magnetic antenna combination and orientation with additional rotation and position measurements
US6927578B2 (en) * 2002-12-19 2005-08-09 Schlumberger Technology Corporation Detection of borehole currents due to a decentered transverse magnetic dipole transmitter
US7382135B2 (en) * 2003-05-22 2008-06-03 Schlumberger Technology Corporation Directional electromagnetic wave resistivity apparatus and method
RU2344445C2 (ru) * 2003-08-05 2009-01-20 Шлюмбергер Текнолоджи Б.В. Устройство и способы для снижения влияния скважинных токов
US6933726B2 (en) * 2003-08-05 2005-08-23 Schlumberger Technology Corporation Apparatus and methods for reducing borehole current effects
US7202670B2 (en) * 2003-08-08 2007-04-10 Schlumberger Technology Corporation Method for characterizing a subsurface formation with a logging instrument disposed in a borehole penetrating the formation
US7138897B2 (en) * 2003-10-15 2006-11-21 Schlumberger Technology Corporation Induction measurements with reduced borehole effects
US20050083061A1 (en) * 2003-10-17 2005-04-21 Tabanou Jacques R. Methods and systems for estimating formation resistivity that are less sensitive to skin effects, shoulder-bed effects and formation dips
US7091877B2 (en) * 2003-10-27 2006-08-15 Schlumberger Technology Corporation Apparatus and methods for determining isotropic and anisotropic formation resistivity in the presence of invasion
US7514930B2 (en) * 2003-12-02 2009-04-07 Schlumberger Technology Corporation Apparatus and method for addressing borehole eccentricity effects
US7027923B2 (en) * 2003-12-12 2006-04-11 Schlumberger Technology Corporation Method for determining sonde error for an induction or propagation tool with transverse or triaxial arrays
US7386430B2 (en) * 2004-03-19 2008-06-10 Schlumberger Technology Corporation Method of correcting triaxial induction arrays for borehole effect
US7652478B2 (en) 2004-05-07 2010-01-26 Baker Hughes Incorporated Cross-component alignment measurement and calibration
US8030935B2 (en) * 2004-10-15 2011-10-04 Halliburton Energy Services, Inc. Minimizing the effect of borehole current in tensor induction logging tools
US7436184B2 (en) * 2005-03-15 2008-10-14 Pathfinder Energy Services, Inc. Well logging apparatus for obtaining azimuthally sensitive formation resistivity measurements
US7414405B2 (en) 2005-08-02 2008-08-19 Pathfinder Energy Services, Inc. Measurement tool for obtaining tool face on a rotating drill collar
US7477162B2 (en) * 2005-10-11 2009-01-13 Schlumberger Technology Corporation Wireless electromagnetic telemetry system and method for bottomhole assembly
US8931335B2 (en) * 2006-04-07 2015-01-13 Baker Hughes Incorporation Processing of multi-component induction data in the presence of borehole abnormalities
CN101501297B (zh) * 2006-07-11 2013-10-16 哈里伯顿能源服务公司 模块化地质导向工具组件
WO2008008346A2 (fr) * 2006-07-12 2008-01-17 Halliburton Energy Services, Inc. Procédé et appareil pour construire une antenne inclinée
US8593147B2 (en) 2006-08-08 2013-11-26 Halliburton Energy Services, Inc. Resistivity logging with reduced dip artifacts
US7902827B2 (en) * 2006-09-19 2011-03-08 Baker Hughes Incorporated Method and apparatus for combined induction and imaging well logging
US20080224706A1 (en) * 2006-11-13 2008-09-18 Baker Hughes Incorporated Use of Electrodes and Multi-Frequency Focusing to Correct Eccentricity and Misalignment Effects on Transversal Induction Measurements
US7742008B2 (en) * 2006-11-15 2010-06-22 Baker Hughes Incorporated Multipole antennae for logging-while-drilling resistivity measurements
US8274289B2 (en) * 2006-12-15 2012-09-25 Halliburton Energy Services, Inc. Antenna coupling component measurement tool having rotating antenna configuration
US8299795B2 (en) * 2007-02-19 2012-10-30 Schlumberger Technology Corporation Independently excitable resistivity units
US8395388B2 (en) * 2007-02-19 2013-03-12 Schlumberger Technology Corporation Circumferentially spaced magnetic field generating devices
US8436618B2 (en) * 2007-02-19 2013-05-07 Schlumberger Technology Corporation Magnetic field deflector in an induction resistivity tool
US7598742B2 (en) * 2007-04-27 2009-10-06 Snyder Jr Harold L Externally guided and directed field induction resistivity tool
US20090230969A1 (en) * 2007-02-19 2009-09-17 Hall David R Downhole Acoustic Receiver with Canceling Element
US8198898B2 (en) * 2007-02-19 2012-06-12 Schlumberger Technology Corporation Downhole removable cage with circumferentially disposed instruments
BRPI0711465B1 (pt) * 2007-03-16 2018-04-24 Halliburton Energy Services, Inc. “ferramenta de perfilagem, e, método para ferramenta de perfilagem de resistividade azimutalmente sensível”
US7898260B2 (en) * 2007-04-10 2011-03-01 Baker Hughes Incorporated Method and apparatus for detecting borehole effects due to eccentricity of induction instruments
US7541813B2 (en) * 2007-04-27 2009-06-02 Snyder Jr Harold L Externally guided and directed halbach array field induction resistivity tool
US7583085B2 (en) * 2007-04-27 2009-09-01 Hall David R Downhole sensor assembly
US8571797B2 (en) 2007-05-08 2013-10-29 Schlumberger Technology Corporation Determining borehole corrected formation on properties
US7558675B2 (en) * 2007-07-25 2009-07-07 Smith International, Inc. Probablistic imaging with azimuthally sensitive MWD/LWD sensors
AU2008348131B2 (en) 2008-01-18 2011-08-04 Halliburton Energy Services, Inc. EM-guided drilling relative to an existing borehole
WO2009137248A2 (fr) * 2008-04-17 2009-11-12 Hardman Richard H Procédés pour produire une diagraphie de propriétés d'une matière
EP2154553A1 (fr) * 2008-08-12 2010-02-17 Schlumberger Holdings Limited Procédé et appareil de mesure de la résistivité de formations
AU2008365630B2 (en) 2008-12-16 2012-05-03 Halliburton Energy Services, Inc. Azimuthal at-bit resistivity and geosteering methods and systems
US8089268B2 (en) * 2009-03-24 2012-01-03 Smith International, Inc. Apparatus and method for removing anisotropy effect from directional resistivity measurements
US8207738B2 (en) * 2009-03-24 2012-06-26 Smith International Inc. Non-planar antennae for directional resistivity logging
US7990153B2 (en) * 2009-05-11 2011-08-02 Smith International, Inc. Compensated directional resistivity measurements
US8159227B2 (en) * 2009-05-11 2012-04-17 Smith International Inc. Methods for making directional resistivity measurements
US9010461B2 (en) 2009-06-01 2015-04-21 Halliburton Energy Services, Inc. Guide wire for ranging and subsurface broadcast telemetry
US8614578B2 (en) * 2009-06-18 2013-12-24 Schlumberger Technology Corporation Attenuation of electromagnetic signals passing through conductive material
WO2011002461A1 (fr) 2009-07-02 2011-01-06 Halliburton Energy Services, Inc. Réseau de forage pour la mesure de distances et la télémétrie en puits croisés
US8427164B2 (en) * 2009-07-09 2013-04-23 Baker Hughes Incorporated Apparatus and method for reducing effects of eccentricity in induction tools
US8466682B2 (en) * 2009-09-29 2013-06-18 Schlumberger Technology Corporation Apparatus and method for downhole electromagnetic measurement while drilling
US8860416B2 (en) 2009-10-05 2014-10-14 Halliburton Energy Services, Inc. Downhole sensing in borehole environments
WO2011043851A1 (fr) 2009-10-05 2011-04-14 Halliburton Energy Services, Inc. Évaluation approfondie d'anomalies résistantes dans des environnements de trou de forage
AU2010343292B2 (en) 2010-01-22 2014-10-16 Halliburton Energy Services Inc. Method and apparatus for resistivity measurements
US8570044B2 (en) * 2010-03-01 2013-10-29 Westerngeco L.L.C. Providing measurements to enable determination of electrical resistivity anisotropy of a subterranean structure
US20110227578A1 (en) 2010-03-19 2011-09-22 Hall David R Induction Resistivity Tool that Generates Directed Induced Fields
US9164192B2 (en) 2010-03-25 2015-10-20 Schlumberger Technology Corporation Stress and fracture modeling using the principle of superposition
US9581718B2 (en) * 2010-03-31 2017-02-28 Halliburton Energy Services, Inc. Systems and methods for ranging while drilling
AU2011232848B2 (en) 2010-03-31 2014-07-31 Halliburton Energy Services, Inc. Multi-step borehole correction scheme for multi-component induction tools
US9322796B2 (en) * 2010-06-01 2016-04-26 Halliburton Energy Services, Inc. Fluid resistivity sensor
US8600115B2 (en) 2010-06-10 2013-12-03 Schlumberger Technology Corporation Borehole image reconstruction using inversion and tool spatial sensitivity functions
US20110316542A1 (en) * 2010-06-29 2011-12-29 Frey Mark T Slotted shield for logging-while-drilling tool
US8536871B2 (en) 2010-11-02 2013-09-17 Schlumberger Technology Corporation Method of correcting resistivity measurements for toll bending effects
EP2640932A4 (fr) * 2010-11-19 2018-01-17 Schlumberger Technology Corporation Instrument et procédé de diagraphie à trou ouvert pour réaliser des mesures magnétiques et de résistivité ultra-profondes
US9658360B2 (en) 2010-12-03 2017-05-23 Schlumberger Technology Corporation High resolution LWD imaging
MY163397A (en) 2011-01-25 2017-09-15 Halliburton Energy Services Inc Apparatus and method for making induction measurements
US8626446B2 (en) 2011-04-01 2014-01-07 Schlumberger Technology Corporation Method of directional resistivity logging
US8968283B2 (en) 2011-05-19 2015-03-03 Covidien Lp Ultrasound device for precise tissue sealing and blade-less cutting
CA2849245A1 (fr) 2011-10-31 2013-05-10 Halliburton Energy Services, Inc. Systemes multicomposants de diagraphie par induction et procedes d'utilisation en temps reel d'une correction de trou de forage d'obm
US8797035B2 (en) 2011-11-09 2014-08-05 Halliburton Energy Services, Inc. Apparatus and methods for monitoring a core during coring operations
US8854044B2 (en) * 2011-11-09 2014-10-07 Haliburton Energy Services, Inc. Instrumented core barrels and methods of monitoring a core while the core is being cut
EP2836860A4 (fr) 2012-06-25 2015-11-11 Halliburton Energy Services Inc Systèmes de diagraphie à antennes inclinées et procédés donnant des signaux de mesure robustes
US9213124B2 (en) * 2013-03-22 2015-12-15 Oliden Technology, Llc Restorable antennae apparatus and system for well logging
AU2013408734B2 (en) * 2013-12-27 2017-06-22 Halliburton Energy Services, Inc. Drilling collision avoidance apparatus, methods, and systems
WO2016195715A1 (fr) * 2015-06-05 2016-12-08 Halliburton Energy Services, Inc. Système de capteur pour mesures galvaniques en puits
WO2017184154A1 (fr) * 2016-04-21 2017-10-26 Halliburton Energy Services, Inc. Minimisation du courant azimutal induit sur des éléments tubulaires par des émetteurs
CA3019471C (fr) * 2016-05-06 2021-01-12 Halliburton Energy Services, Inc. Evaluation de telemetrie et de resistivite au moyen de signaux de courant
US10466380B2 (en) 2016-09-23 2019-11-05 Halliburton Energy Services, Inc. Utilizing diverse excitation sources in electromagnetic ranging
US11035975B2 (en) 2016-12-21 2021-06-15 Halliburton Energy Services, Inc. Use of gap subs behind a coil antenna in electromagnetic induction tools
WO2018140056A1 (fr) 2017-01-30 2018-08-02 Halliburton Energy Services, Inc. Raccord à entrefer actif
US10684384B2 (en) * 2017-05-24 2020-06-16 Baker Hughes, A Ge Company, Llc Systems and method for formation evaluation from borehole
US20210140307A1 (en) * 2019-11-12 2021-05-13 Saudi Arabian Oil Company Removing the Effect of Near-Surface Inhomogeneities in Surface-to-Borehole Measurements
CN113376704B (zh) * 2021-06-07 2023-01-10 电子科技大学 一种基于电发射-磁接收的井间电磁探测系统及方法

Family Cites Families (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3329889A (en) 1962-11-28 1967-07-04 Schlumberger Technology Corp Methods and apparatus for investigating earth formations featuring simultaneous focussed coil and electrode system measurements
US3305771A (en) 1963-08-30 1967-02-21 Arps Corp Inductive resistivity guard logging apparatus including toroidal coils mounted on a conductive stem
US3388325A (en) 1966-02-23 1968-06-11 Schlumberger Well Surv Corp Apparatus for supplying an equal potential to circumferential portions of a circumferentially extending electrode
US3452269A (en) 1968-07-15 1969-06-24 Schlumberger Technology Corp Methods and apparatus for investigating earth formations including adjusting the potential distribution in an axial direction through a borehole
FR2128200B1 (fr) 1971-03-11 1974-03-01 Schlumberger Prospection
US3760260A (en) 1972-04-24 1973-09-18 Schlumberger Technology Corp Method and apparatus for investigating earth formations by emitting survey and auxiliary currents from the same electrode
US4087740A (en) 1973-01-19 1978-05-02 Schlumberger Technology Corporation Spherical focusing method and apparatus for determining the thickness of a zone in an earth formation traversed by a borehole
EP0001879B2 (fr) 1977-09-07 1989-11-23 Imperial Chemical Industries Plc Polyéthercétones aromatiques thermoplastiques, procédé pour leur préparation et leur application comme isolants électriques
US4286217A (en) 1979-02-01 1981-08-25 Schlumberger Technology Corporation Device for electrode-type electrical logging tools and tool incorporating said device
US4319191A (en) 1980-01-10 1982-03-09 Texaco Inc. Dielectric well logging with radially oriented coils
FR2492540A1 (fr) 1980-10-17 1982-04-23 Schlumberger Prospection Dispositif pour diagraphie electromagnetique dans les forages
US4532614A (en) * 1981-06-01 1985-07-30 Peppers James M Wall bore electrical generator
US4536714A (en) 1982-04-16 1985-08-20 Schlumberger Technology Corporation Shields for antennas of borehole logging devices
US4538109A (en) 1982-06-23 1985-08-27 Schlumberger Technology Corporation Apparatus and method for electromagnetic logging with reduction of spurious modes
US4873488A (en) 1985-04-03 1989-10-10 Schlumberger Technology Corporation Induction logging sonde with metallic support having a coaxial insulating sleeve member
US4949045A (en) 1987-10-30 1990-08-14 Schlumberger Technology Corporation Well logging apparatus having a cylindrical housing with antennas formed in recesses and covered with a waterproof rubber layer
US5041975A (en) 1988-09-06 1991-08-20 Schlumberger Technology Corporation Borehole correction system for an array induction well-logging apparatus
US5058077A (en) 1990-10-09 1991-10-15 Baroid Technology, Inc. Compensation technique for eccentered MWD sensors
US5235285A (en) 1991-10-31 1993-08-10 Schlumberger Technology Corporation Well logging apparatus having toroidal induction antenna for measuring, while drilling, resistivity of earth formations
US5339037A (en) 1992-10-09 1994-08-16 Schlumberger Technology Corporation Apparatus and method for determining the resistivity of earth formations
FR2687228B1 (fr) 1992-02-12 1994-05-06 Schlumberger Services Petroliers Procede et dispositif de diagraphie pour l'etude de caracteristiques geometriques d'un forage.
JP2534193B2 (ja) * 1993-05-31 1996-09-11 石油資源開発株式会社 指向性インダクション検層法および装置
US5530358A (en) * 1994-01-25 1996-06-25 Baker Hughes, Incorporated Method and apparatus for measurement-while-drilling utilizing improved antennas
US5757191A (en) 1994-12-09 1998-05-26 Halliburton Energy Services, Inc. Virtual induction sonde for steering transmitted and received signals
US5963036A (en) * 1996-02-07 1999-10-05 Schlumberger Technology Corporation Well logging apparatus and method for determining properties of earth formations that have been invaded by borehole fluid
US5644231A (en) * 1996-03-04 1997-07-01 Schlumberger Technology Corporation High pressure magnetic antenna assembly
EP0909398B1 (fr) 1996-07-01 2002-09-11 Shell Internationale Researchmaatschappij B.V. Diagraphie electrique d'une formation geologique stratifiee
US5781436A (en) 1996-07-26 1998-07-14 Western Atlas International, Inc. Method and apparatus for transverse electromagnetic induction well logging
US5841280A (en) * 1997-06-24 1998-11-24 Western Atlas International, Inc. Apparatus and method for combined acoustic and seismoelectric logging measurements
US6084052A (en) 1998-02-19 2000-07-04 Schlumberger Technology Corporation Use of polyaryletherketone-type thermoplastics in downhole tools
US6044325A (en) 1998-03-17 2000-03-28 Western Atlas International, Inc. Conductivity anisotropy estimation method for inversion processing of measurements made by a transverse electromagnetic induction logging instrument
US6163155A (en) 1999-01-28 2000-12-19 Dresser Industries, Inc. Electromagnetic wave resistivity tool having a tilted antenna for determining the horizontal and vertical resistivities and relative dip angle in anisotropic earth formations
US6181138B1 (en) 1999-02-22 2001-01-30 Halliburton Energy Services, Inc. Directional resistivity measurements for azimuthal proximity detection of bed boundaries
US6351127B1 (en) 1999-12-01 2002-02-26 Schlumberger Technology Corporation Shielding method and apparatus for selective attenuation of an electromagnetic energy field component
US6348796B2 (en) 2000-01-11 2002-02-19 Baker Hughes Incorporated Image focusing method and apparatus for wellbore resistivity imaging
US6788065B1 (en) 2000-10-12 2004-09-07 Schlumberger Technology Corporation Slotted tubulars for subsurface monitoring in directed orientations

Also Published As

Publication number Publication date
GB2376076B (en) 2003-11-05
US20020105332A1 (en) 2002-08-08
US20030155924A1 (en) 2003-08-21
US6680613B2 (en) 2004-01-20
US20030146753A1 (en) 2003-08-07
NO20016101L (no) 2002-06-17
GB0129575D0 (en) 2002-01-30
NO20016101D0 (no) 2001-12-14
US6624634B2 (en) 2003-09-23
AU765066B2 (en) 2003-09-04
US6573722B2 (en) 2003-06-03
CA2363789C (fr) 2004-05-04
GB2376076A (en) 2002-12-04
US6710601B2 (en) 2004-03-23
AU9340401A (en) 2002-06-20
RU2305300C2 (ru) 2007-08-27
US20030146751A1 (en) 2003-08-07

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